Improvement in brakes for windmills



S. L. BIGNALL, T. B. WHITTLESEY & F. M. GOODHUE.

BRAKES FOR WIND-MILLS. 3o,1ag, Patented- July 25,1876.

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NJHEBS. PHOTO-LI'HWGRAPHER. WASHlNG ON. D. Q

JUL JUUL UNITED STATES SOLOMOlS L. BIGNALL, OF CHICAGO, AND THOMAS -B.WHITTLESEY AND PATENT OFFICE.

FRANK M. GOQDHUE, OF ST. CHARLES, ILLINOIS.

IMPROVEMENT IN BRAKES FOR WlNDiVllLLS.

Specification forming part of Letters Patent No. 180,189, dated July 25,1876; application tiled May 8, 1876.

and its nature consists in a metal strap or band attached to theturn-table, and brought over the pitman-wheel and extended through thearm of the rotary upright vane, whereby, when the said vane is broughtdown by the wind, so as to turn the wind-wheel edgewise into the wind,the parts will be securely locked, so as to prevent oscillation, as thewhole is to be hereinafter fully described and shown.

In the drawings, Figure l is a side elevation of a windmill patented toFrank M.

Goodhue, April 7, 1874, embodying our improvement; Fig.2, a section ofFig. l on line 90, looking in the direction of dart Z.

A represents the turn-table; B, the tailvane; D, a broken section of thewind-wheel J, the shaft; E, the rotating upright vane, and G I H theconnecting-rods M, the weighted lever, and N the crank-wheel, which areconstructed substantially like the parts in the patent referred to. Tothe turn-table A, at It, is attached ametal band-brake, which is broughtover the crank-whee1 N Fig. 2, and extended through the arm E of theupright vane, or through the plate 0, attached to the said arm. Theouter end of this band is provided with a lug, W, so that when theupright Vane E is brought over, as it is in practice, to the positionshown by dotted lines V, Fig. 2, it will clamp the brake-band L tothecra-nk-wheel N, and thus stop the rotation of the windwheel D, whichgives motion to the wheel N by means of a shaft, J, connecting the twowheels in the ordinary manner. The movement of the vane E is such thatwhen the wind slackens away the weighted arm M, attached to the base ofthe vane E, will bring the vane to an' upright position, and thusrelease the band L, after which it may-again bring the wind-wheel D to astand, when the vane is brought over to a horizontal position.

Brakes have been before used for checking the movement of mechanism;therefore we confine ourselves to the brake as constructed to operatewith a windmill.

We claim'and desireto secure by Letters Patent of the 'United States Theband L, combined with a wheel on shaft J, and rotating upright vane E,as and for the purpose specified.

SOLOMON L.'BIGNALL. THOMAS B. WHITTLESEY. FRANK M. GOODHUE. Witnesses MO. H. ADIX, G. L. OHAPIN.

